Oil filter



arch 31, 1936. R, N. BURCKH'ALTER Er AL 2,035,530

A011. FILTER FiledJuly 11, 19:52

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Patented Mar. 31, 1936 UNITED STATES OIL FILTER Robert Nash Burckhalter and James Marshall Osburn,

lllichigan City,

1nd., assignors to Michiana Products Corporation, Michigan City, Ind., a corporation of Indiana Application July 11, 1932, Serial No. 621,904

3 Claims.

The principal object of this invention is to simplify the mounting of an oil lter on the crank case of an engine, or other support, and to provide oil connections suited to a wide range of requirements.

In the main, this is accomplished by using a single properly located bolt for mounting the filter on the support and so locating the oil passages that the inlet and outlet connections may be made by boring the bolt. Thus, Where it is desired to have no exposed pipe, a single bolt having two bores in it will secure the iilter to the support and also provide inlet and outlet oonnections.

Fig. 1 is a plan section through the lter base, and showing a detail of a wall to which the base is secured; and

Fig. 2 is a sectional view on the line 2--2 of Fig. 1.

But these forms are merely illustrative embodiments of the invention, which may take other forms suited to particular uses.

The general form of the lter is not of the essence of the invention. It is shown as comprising a casing Il, suitably attached to a base I8, having outlet and inlet passages 80, 8|, communicating with the chamber of the casing Within which a ltering element I2 is housed, such element being between the passages. The base I has a through bore for the accommodation of an attaching bolt 19, threaded at its inner end and having a lateral flange 58 adjacent thereto for engaging a suitable bolt-hole in the outer face of a wall, such as 84, which may be the wall of the crank case of an internal combustion engine. To the outer threaded end of the bolt 19 is applied a suitable binding nut for clamping the base I0 to the lateral flange 50.

'I'he bolt 19 has two longitudinal ducts 'I8 and 82, the former opening through its inner end and the latter opening laterally adjacent to such end and communicating with a duct 85 leading through the inner face of the wall 84, from which duct the oil may be conveyed as may be desired. Both of the ducts '18, 82, open laterally at their inner ends to communicate the one with the passage 8| and the other with the passage 80. A by-pass 86 in the base l0, controlled by a pressure regulating spring-closed check valve 81,

connects the inner end of the ducts 18, 82, the bore for the bolt 19 being preferably enlarged, as shown at 56, adjacent such ends.

Oil entering the base through the duct 18 passes into the casing l l by the passage 8 I thence 5 through the lter element I2, and makes its exit through the passage 88 and duct 82. Should the oil be delivered Vto the device at greater pressure than is desirable for the service to be performed after ltering, the valve 86 is unseated and 10 enough oil passes through the relief duct 85 and directly to the outlet duct 82 to suitably reduce the pressure.

The form of the parts and the detail arrangement thereof, and. of the passages, may be varied as desired within the scope of the appended claims.

We claim as our invention:

l. An oil filter comprising a hollow lter element, a shell enclosing the element, a base hav- 20 ing a passage communicating with the shell outside of the element, and a passage communieating with the inside of the element, and also having a centrally located bore, transverse to the last mentioned passage, a boltxed in the bore and having a threaded portion projecting laterally to mount the lter on a support, such bolt having passages opening through its inner end portion and communicating, respectively, with the named base passages.

2. A filter comprising a base having inlet and outlet passages, a iilter element between the passages, a bolt setting through the base to attach it to a support, the bolt having inlet and outlet passages opening through -its inner end portion and communicating with the named passages of the base.

3. A filter comprising a base having inlet and outlet passages, a lter element between the passages, a bolt setting through the base to attach it to a support, the bolt having inlet andl outlet passages opening through its inner end portion and communicating with the named passages of the base, the base being also provided with a check-Valve controlled by-pass connecting the bolt passages.

ROBERT NASH BURCKHALTER. JAMES MARSHALL OSBURN. 

